176 lines
6.9 KiB
PHP
176 lines
6.9 KiB
PHP
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<?php
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/**
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* 生成图像验证码
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*
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* 代码来自 ThinkPHP 的 Lib/ORG/Util/Image.class.php 文件，特此对 ThinkPHP 团队表示感谢 :)
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*
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* Custom
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*
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* LICENSE:
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*
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* @category Custom
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* @package Custom
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* @subpackage Controller
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* @copyright Copyright (c) KenJi
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* @license
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* @version
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*/
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/**
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* Zend_Controller_Plugin_Abstract
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*/
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//require_once 'Zend/Controller/Plugin/Abstract.php';
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//require_once 'Zend/Session/Namespace.php';
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class Custom_Controller_Plugin_ImgCode extends Zend_Controller_Plugin_Abstract
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{
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/**
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+----------------------------------------------------------
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* 生成图像验证码
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+----------------------------------------------------------
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* @static
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* @access public
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+----------------------------------------------------------
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* @param string $length 位数
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* @param string $mode 类型 0 字母 1:数字，2：大写字母 3:小写字母 4:以上混合形式
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* @param string $type 图像格式
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* @param string $width 宽度
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* @param string $height 高度
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+----------------------------------------------------------
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* @return string
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+----------------------------------------------------------
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* @throws ThinkExecption
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+----------------------------------------------------------
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*/
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function image2($length=4,$mode=4,$type='png',$width=50,$height=25)
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{
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$randval = $this->rand_string($length,$mode);//生成随机数
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//$authCode = new Zend_Session_Namespace('Auth_Code');
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//$authCode->imagecode = $randval;//生成session
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$_SESSION['vdcodes'] = strtolower($randval);
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$width = ($length*9+10)>$width?$length*9+10:$width;
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if ( $type!='gif' && function_exists('imagecreatetruecolor')) {
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$im = @imagecreatetruecolor($width,$height);
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}else {
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$im = @imagecreate($width,$height);
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}
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$r = Array(225,255,255,223);
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$g = Array(225,236,237,255);
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$b = Array(225,236,166,125);
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$key = mt_rand(0,3);
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$backColor = imagecolorallocate($im, $r[$key],$g[$key],$b[$key]); //背景色（随机）
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$borderColor = imagecolorallocate($im, 100, 100, 100); //边框色
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$pointColor = imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255)); //点颜色
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@imagefilledrectangle($im, 0, 0, $width - 1, $height - 1, $backColor);
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@imagerectangle($im, 0, 0, $width-1, $height-1, $borderColor);
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$stringColor = imagecolorallocate($im,mt_rand(0,200),mt_rand(0,120),mt_rand(0,120));
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// 干扰
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for($i=0;$i<10;$i++){
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$fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
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imagearc($im,mt_rand(-10,$width),mt_rand(-10,$height),mt_rand(30,300),mt_rand(20,200),55,44,$fontcolor);
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}
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for($i=0;$i<25;$i++){
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$fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
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imagesetpixel($im,mt_rand(0,$width),mt_rand(0,$height),$pointColor);
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}
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@imagestring($im, 5, 5, 3, $randval, $stringColor);
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$this->output($im,$type);
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}
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// 更复杂的验证码
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function image3($length=4,$type='png',$width=50,$height=60,$fontface='fpnf.ttf',$verifyName='verify') {
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$code = $this->rand_string($length,4);
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$width = ($length*25)>$width?$length*25:$width;
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$authCode = new Zend_Session_Namespace('Auth_Code');
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$authCode->imagecode = $randval;
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$im=imagecreatetruecolor($width,$height);
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$borderColor = imagecolorallocate($im, 100, 100, 100); //边框色
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$bkcolor=imagecolorallocate($im,250,250,250);
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imagefill($im,0,0,$bkcolor);
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@imagerectangle($im, 0, 0, $width-1, $height-1, $borderColor);
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// 干扰
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for($i=0;$i<15;$i++){
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$fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
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imagearc($im,mt_rand(-10,$width),mt_rand(-10,$height),mt_rand(30,300),mt_rand(20,200),55,44,$fontcolor);
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}
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for($i=0;$i<255;$i++){
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$fontcolor=imagecolorallocate($im,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
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imagesetpixel($im,mt_rand(0,$width),mt_rand(0,$height),$fontcolor);
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}
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if(!is_file($fontface)) {
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$fontface = dirname(__FILE__)."/".$fontface;
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}
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for($i=0;$i<$length;$i++){
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$fontcolor=imagecolorallocate($im,mt_rand(0,120),mt_rand(0,120),mt_rand(0,120)); //这样保证随机出来的颜色较深。
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$codex= substr($code,$i,1);
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imagettftext($im,mt_rand(16,20),mt_rand(-60,60),40*$i+20,mt_rand(30,35),$fontcolor,$fontface,$codex);
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}
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$this->output($im,$type);
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}
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function output($im,$type='png')
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{
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header("Content-type: image/".$type);
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$ImageFun='Image'.$type;
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$ImageFun($im);
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imagedestroy($im);
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}
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/**
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+----------------------------------------------------------
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* 产生随机字串，可用来自动生成密码 默认长度6位 字母和数字混合
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+----------------------------------------------------------
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* @param string $len 长度
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* @param string $type 字串类型
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* 0 字母 1 数字 其它 混合
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* @param string $addChars 额外字符
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+----------------------------------------------------------
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* @return string
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+----------------------------------------------------------
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*/
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function rand_string($len=6,$type='',$addChars='') {
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$str ='';
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switch($type) {
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case 0:
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$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.$addChars;
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break;
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case 1:
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$chars= str_repeat('0123456789',3);
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break;
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case 2:
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$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZ'.$addChars;
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break;
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case 3:
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$chars='abcdefghijklmnopqrstuvwxyz'.$addChars;
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break;
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default :
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// 默认去掉了容易混淆的字符oOLl和数字01，要添加请使用addChars参数
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$chars='ABCDEFGHIJKMNPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz23456789'.$addChars;
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break;
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}
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if($len>10 ) {//位数过长重复字符串一定次数
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$chars= $type==1? str_repeat($chars,$len) : str_repeat($chars,5);
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}
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if($type!=4) {
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$chars = str_shuffle($chars);
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$str = substr($chars,0,$len);
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}else{
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// 中文随机字
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for($i=0;$i<$len;$i++){
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$str.= substr($chars, floor(mt_rand(0,mb_strlen($chars,'utf-8')-1)),1);
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}
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}
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return $str;
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}
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}
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